Nut-lock.



PATBNTED MAR.;19, 1907.

H. DAY.

NUT LOCK.

Application filed May 28.

lb (Ml LU/l/UIH/ it vim/ concern:

Be it known that I, HARRY DAY, a citizen. 3

of the United States, residing at Upper San- 1 dusky, in the county of l/Vyandot and State of Ohio, have invented certain new and useful Improvements in Nut-Locks, of which the following is a specification.

My invention relates to nut-locks, and belongs to that particular type of devices designed for securing the nut upon a bolt or screw against accidental displacement, while permitting the ready removal of the nut by 1 hand, if desired.

It is the ob ect of my invention to produce :5 a nut-lock having special formation and arrangement whereby it is believed great strength and security results and which by reason of its special formation and arrangement may be exposed to weather conditions,

however inclement and for whatever period without impairing either the of time, strength or security of the fastening. Furthermore, in the majority of nut-locking devices with which I am familiar the construc- 2 5 tions are more or less affected by long ex posure to wet and dry atmospheric surroundings, and especially ing dust are rendered oftentimes difficult of detachment and removal when desired. Fre- 0 quently in my personal experience it has been practically impossible to remove the 1 nuts from bolts which have long occupied positions in the open air uncovered. By the 1 use of my invention I have found that even 3 5 after such long-continued subjection to severe weather and to dust and grit, which is i always flying about and steadily accumulates upon the fastening, there is comparatively no trouble met with when it is desired to detach the lock and nut for any reason from the end and threads of the bolt.

The particular construction and arrangement constituting my said invention is set] of out in the accompanying drawings,

4 5 which- Figure 1 represents a side view. Fig. 2 1s a side view showlng the cap in vertical section.

Fig. 3 is a bottom plan view of the cap about the nut, a cross-section of the bolt being also shown. Fig. 4 is a side view of the end of the bolt with the cap omitted.

In these drawings and this description like l etters refer to the same parts throughout.

Considering the drawings, the letter A des- 5 5 ignates the bolt, having the threaded portion a and a squared end a, pierced by one or Specification of Letters Patent.

in situations open to fly- 1 PATENT OFFICE.

Yatented March 19, 1907.

1906. Serial No. 319,067.

3 more transverse holes (1?. The nut engaging the threaded portion of the bolt is marked B. The cap which looks the nut is referred to by the letter O, and the cotter, which passes through one or the other of the holes (1- and prevents the cap from slipping off the bolt in 1 the direction of the length of the bolt, is designated by letter D.

The particular construction of the cap, l which constitutes an essential feature of my invention, comprises a mouth 0, corresponding in shape to the nut. For example, in the drawings and the mouth 0 of the cap is therefore of that shape. It will be here observed that the outer walls of the cap near the mouth and referred to by the characters 0 correspond to the sides of the mouth of the cap in num ber and position. The outer walls 0 will be again mentioned.

Cap C has the conoidal upper portion 0 which form enables it to be made very strong and heavy, if desired. Passing through the apex is the square throat a that is of such size as to fit movable the squared end a of the bolt.

Necessarily the squared end 0/ of bolt A is smaller in cross-section than the thread- 1 ed portion a of the bolt, and the throat c of cap O fits and admits only the squared end a. It will be understood that in order to permit cap O to move up and down on the bolt the additional cavity or passage c is provided to receive the threaded portion of bolt A, as best shown in Fig. 2. Without the additional cavity the cap could not be adjusted along the bolt following nut B.

To describe the operation of my invention, let it be assumed that the nut has been set up as far as desired and the cap placed over it and the cotter passed through the nearest of the holes a and spread in the ordinary manner. Now it is believed to be shown that the cap cannot be accidentally rotated, and that being the case the nut can neither become displaced in any direction. Supposing that from long occupation of its place without detachment or removal there is any 1 accumulation of rust or dirt upon the fastening, it might become so incrusted as to hide the junctions of the parts entirely. It is found that by placing the wrench upon the exterior walls 0 of the cap and by working it back and forth a few times the whole thing is l fully loosened and is thereafter readily de- 'tached.

I have illustrated a hexagonal nut,

Having now described my invention and l said. throat and mouth and constructed to reexplained the mode of its operation, what I I ceive the threaded portion of the bolt, and a [5 claim is pin adapted to be passed through either of In a nut-lock, the combination with a bolt 1 the holes in the said squared end of the bolt to 5 having a squared end and a threaded porl retain the cap and lock the nut, substantially tion, the squared end of the bolt having a I as described. number of transverse holes, of a nut engag- In testimony whereof I afiix my signature 2o lfilg the itlnreacilledhportiqln (if the bo%t, a qap j in presence of two Witnesses.

aving "orrne t rou t e top tlereo a 1o throat movably fitting the squared end of the HARRY bolt, the said cap having a mouth formed to WVitnesses: movably fit the said nut, the said cap having 4 T. J. LAUKER, also an additional cavity opening into the i J. C. WEAVER. 

